Dranetz PowerGuide 4400, Руководство пользователя

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5-6
Overview
Section B
Wizard Setup
Overview
Introduction
Wizard Setup guides the user through the circuit setup step-by-step, via a series of
screens prompting for information about the circuit to be monitored. The unit
automatically turns on the correct channels, sets the parameter thresholds and
waveform capture settings depending on the detected circuit type, nominal voltage and
current values, and monitoring mode specified by the user.
Monitoring
modes
The 4400 allows users to monitor events in the following setup categories: Standard
Power Quality, Current Inrush, Fault Recorder, Long-term Timed Recording,
Continuous Data Logging, and EN50160 Power Quality mode. Selecting any setup
category automatically sets trigger and capture conditions. Advanced users are free to
mix and match settings (see Chapter 6 Advanced Setup Options).
Standard Power Quality, Demand, Energy: The 4400 algorithms automatically evaluate
existing rms and waveform conditions to optimize setups to reliably capture data. This
feature ensures that the first-time user gets the expected results, while providing the
experienced user with the ability to tweak settings for specific applications. Either way,
the necessary data used to identify critical events and optimize mitigation solutions is
recorded into the data card as it occurs.
Current Inrush: Determining system characteristics during current inrush conditions
such as impedance changes during motor energization or the I
2
t curve of a breaker trip
is key to preventative maintenance and enhanced power system performance. Inrush-
type events such as motor start-up typically requires extended duration cycle-by-cycle
recording. With 4400, users can capture and store detailed data to evaluate system
performance against specifications and previous benchmark data. Under the current
inrush mode, triggers are current-based. By operating in the inrush mode, the
instrument will capture and store highly detailed data to a Compact Flash data card in
real time, then rearm and be ready to capture data during the next test run.
Fault Recorder: A fault in a wire circuit is usually due to unintentional grounding, a
break in the line, a crossing or shorting of the wires, etc. A digital fault recorder logs
extended duration cycle-by-cycle recording. Under the fault recorder mode, triggers are
voltage-based. The 4400 can help locate failures detected in various components of
assorted equipment by recording an extended period of cycle-by-cycle data to capture
the entire duration of the fault and the associated system response.
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